Eta1 Pictoris

η¹ Pictoris, Latinised as Eta¹ Pictoris, is a solitary^[9] star in the southern constellation of Pictor. It is faintly visible to the naked eye with an apparent visual magnitude of +5.37.^[2] Based upon an annual parallax shift of 38.35 mas as seen from the Earth,^[1] the system is located 85 light years from the Sun. The star made its closest approach to the Sun about 1.1 million years ago with a perihelion passage of about 24 ly (7.5 pc).^[10]

For other stars with this Bayer designation, see η Pictoris.

Eta¹ Pictoris

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Pictor
Right ascension	05h 02m 48.68641s[1]
Declination	−49° 09′ 05.0644″[1]
Apparent magnitude (V)	+5.37[2]
Characteristics
Spectral type	F5 V[3]
U−B color index	−0.01[2]
B−V color index	+0.43[2]
Astrometry
Radial velocity (Rv)	21.4±2.8[4] km/s
Proper motion (μ)	RA: −43.67[1] mas/yr Dec.: +27.37[1] mas/yr
Parallax (π)	38.35±0.18 mas[1]
Distance	85.0 ± 0.4 ly (26.1 ± 0.1 pc)
Absolute magnitude (MV)	3.28[5]
Details
Mass	1.37[6] M☉
Radius	1.469[7] R☉
Luminosity	3.74[7] L☉
Surface gravity (log g)	4.17[6] cgs
Temperature	6,631±225[6] K
Metallicity [Fe/H]	−0.05[3] dex
Rotational velocity (v sin i)	22.7±1.1[5] km/s
Age	2.15[6] Gyr
Other designations
η1 Pic, CD−49°1541, GJ 187, HD 32743, HIP 23482, HR 1649, SAO 217140[8]
Database references
SIMBAD	data

This is an F-type main sequence star with a stellar classification of F5 V^[3] and it is chromospherically active.^[3] It is an estimated 2.15^[6] billion years old and is spinning with a projected rotational velocity of 22.7 km/s.^[5] The star has 1.4 times the mass of the Sun^[6] and about 1.47 times the Sun's radius.^[7] It is radiating 3.7 times the Sun's luminosity from its photosphere^[11] at an effective temperature of roughly 6,631 K.^[6]